US tire makers have spoken, and they've told the country's cheapskates to upgrade their damn, crusty old, bald tires before they kill someone already. As reported in the Detroit News, Michelin USA and Continental Tire have joined Bridgestone and Firestone in the issuance of technical bulletins for dealers to replace tires that have trod the earth for a decade of longer. Six years is the norm for automakers' bulletins. Still, some say there's no real data to indicate that tires degrade over time to become unsafe, and that the companies have derived a timeline for their own benefit. Reeducation camps for those riding on original Bias Plys will open next Tuesday.